Manuel eissler



-UNi-rso STATES ATENT titties,

MANUEL EissLER, or NEW YORK, n. Y., ASSIGNOR to THE UNi rEu s'rA'rEsDYNAMITE COMPANY.

ovum-re -SPECIFICATION forming part of Letters Patent 119,347,424, datedAugust T7, 18596,

Applieallon filed September l, 1584, Senial No. l lfipllfl.

To aZZ whom it may concern:

Be it known that l, lit-mum,Eissrinu, of the city of New York, in thecounty and State of New York, have made certain new and usefulImprovemepls in the lllanufactnre of Explosive Compounds; and I herebydeclare thcl'ollowing to bea full and clear description of the same.

In the manufacture of explosive compounds containing liquid explosives,such as nitro- 'glycerinc, it is very desirable to produce them of sucha consistence and composition that con" tact with water will not allecttheir explosive properties, and that the compound may contain alargeproportion of the liquid explosive. The object of my invention is toprod nee an explosive compound which will be capable of containing avery large quantity of nitro-glyccrine, together with nonabsorbentcombust-iblegranules ofuitrate otpotash or soda or other nitratesaltswithout any danger oft'he nit-roglycerine leaking out of the compound,the

compound being also unall'ected by moisture or contact with water.

I am aware that it has long been the practice to mix some combustibleresinous or gummy substance with the granules of nitrate salts, eitherseparate or combined with a carbon, so that the resinous or gummysubstance will coat and render the granules of nitrate salts imperviousto moisture. Granules of nitrate salts so prepared, with an outercovering of resin, have been mixed with nitroglyeerine and an explosivecompound thus produced; but such compound will only admit of the use ofa limited proportion ol' the liquid nitroglycerine with safety, as thenonabsorhent granules allow the nitro glycei 'ine to leak when in excessof a very thin eoatin in the use of such a compound composed of granuleswith a liquid explosive in cases where there is great moisture,the'prcsence of such moisture will cause dcliquescence and separate thegranules and constituent parts of the compound, so as to destroy orimpair its explosive qualities. 'lhis disintegration of the compoundtakes place in the use of all explosive compounds in whichnilroglyccriue is uscd,and held in place by the capillary attraction ofthesolid parlielesoltiic compound (No specimens.)

when such compounds come in contact with great moisture, which is thecase when they are used under water. By my improved process ofmanufacture and combination of iugreuients I produce an explosivecompound eontaininga very large percentage of nitroglye' crinc combinedwith-uou-absorbent granules of nitrate salts, which will not becomedanger, ous i'rom leakage, and is free from the injurious effects ofmoisture even when immersed in water.

In making my explosive compound I. first take a liquid explosive, suchas nitro-glyeerinc, and mix with it about five per cent oi nitratcdcellulose or some fibrous material, such as collodion-cotton and thevarious spe- 'eies of nitrated cellulose, by which I obtain a thicksirupy substance, something similar to thin gclatine. I then preparenon-absorbent combustible granules of nitrate salts by grind 7o ingnitrate ot' potash or soda finely and pouring on it a melted mixturecomposed oi htteen parts of resin, colophony, or tar, and live parts ofparalliue melted together. The resin and paralline is hotand in liquidform when poured on the nitrate salts, and the combined mixture shouldbe thoroughly stirred until all the granules of the nitrate salts arecoated with the paralllnc and resin. This will take aoout seven parts ofthe paralline-and-resin mixture ,80' to one hundred parts ofthe nitratesalts. After the mass of coated granules or of nitrate salts is cool,the parts are ready for the final mixing of the dittcrent ingredients.'iofort-y parts, by weight, of the coated granules of ne o5 trate saltsI add about seven parts of wood or paper pulp, together with about threepartsoi' dextrine, or rye-flour, or glucose, and after intimately mixingthem together, fifty parts of the niixture N0. licomposcd of gelatinized9o nit-roglyecrino) is added. The whole mass being new kneaded together,a uniform plastic mass is formed, as the dcxtrinc or rye-flour will actas a binding agent between the other ingredients.

The above will malie a very strong explosive compound, which is notaitected by contact with or submersion in water.

The proportion of melted resin and paraifine to the nitrate salts willnot vary, nor will the ICU '2 fly means ol'eleetrieity or otherwise.

(fuantihy of cellulose in the sirup or gelatin- I am aware that acompound of unnitrated ized nitroglycerine; but the proportions ofcellulose and nitro-glyeerine is described as the mixture. No. 1 to thegranules of nitrate being mixed with uiter in Patent No. 242,7? salismay be varied, and will only increase or to John M. Le'win; but 1. donot desire to use The proportion of the dextrine or binding being usedby me; and I am also aware of the Hagen: and the wood pulp willalsoslightly vary fact that coated granules are described as bewith theproportion of mixture No. l to the lug mixed wiLh about iltteen percent. of liqdi'y granules ol'nitrate salts,sullicientquantity uid nitroglycol-inc in Patent; No. 183,764,

:0 of the binding agent; and wood pulp only be granted to Egbert Judson,and I do not desire .ing used to bring the compound to a consistto useor claim such a compound; but

once about that of dough. \VhatJ do claim as my invention, and do incase a large proportion of tar or the nisire to secure by LettersPullout, is-

meted cellulose is used to mix wll-h the nitrate I An explosive compoundcomprising coated r5 salts or nitroglyeerine,the quantity of woodnonabsorbenl;granules of nitrate salts, nitropulp required will besmall; or it may be omit1- cellulose, and nita'o-glycerinc, firstchemically decrease the explosive force ot'ihc compound. or claim such acompound, nitraled cellulose ted a'LliGg'QbllClfllS it is used moreparticularly amalgamated, and rye-llour as abindingagent the supplycarbon to the compound. 7 combined together, substantially as and forThis compound may be placed under water the purposes described.

without any protection for a considerable length of time without; injuryto its explosive MANUEL EISSLER. qualities. It; is readily exploded fromcon eussion-such as the discharge ofafulntinate- \Vitnesses: capembedded in it, which may be detonated R. W. WARREN,

l A. BELL M t-\ LUOMSON, Jr.

